#pragma once

#include<iostream>
#include<string>
#include<cstring>
#include<cstdlib>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>

using namespace std;

class Sock
{
public:
    //创建tcp套接字
    static int Socket()
    {
        int sock=socket(AF_INET,SOCK_STREAM,0);
        if(sock<0)
        {
            cerr<<"sock error"<<endl; exit(2);
        }
        return sock;
    }

    static void Bind(int sock,uint16_t port)
    {
        struct sockaddr_in local;
        memset(&local,0,sizeof(local));
        local.sin_family=AF_INET;
        local.sin_port=htons(port);
        local.sin_addr.s_addr=INADDR_ANY;

        if(bind(sock,(struct sockaddr*)&local,sizeof(local))<0)
        {
            cerr<<"bind error"<<endl; exit(3);
        }
    }

    static void Listen(int sock)
    {
        if(listen(sock,5)<0)
        {
            cerr<<"listen error"<<endl; exit(4);
        }
    }

    static int Accept(int sock)
    {
        struct sockaddr_in peer;
        socklen_t len=sizeof(peer);
        int fd=accept(sock,(struct sockaddr*)&peer,&len);
        if(fd>0) return fd;

        return -1;
    }

    static void Connect(int sock,string ip,uint16_t port)
    {
        struct sockaddr_in  server;
        memset(&server,0,sizeof(server));
        server.sin_family=AF_INET;
        server.sin_port=htons(port);
        server.sin_addr.s_addr=inet_addr(ip.c_str());
        if(connect(sock,(struct sockaddr*)&server,sizeof(server))==0)
        cout<<"connect success!"<<endl;
        else
        {
            cout<<"connect failed!"<<endl;exit(5);
        }
    }
};